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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

32769 results found.

  1. GRB 061006: Swift-XRT Team Refined Analysis
  2. GRB061006 (Swift 232585) might be a short-hard GRB
  3. GRB061006: Faulkes Telescope South Observations
  4. GRB 061004: Optical afterglow candidate and redshift
  5. GRB 061004: Las Campanas Optical/NIR Observations
  6. GRB061004: Swift/UVOT optical observations
  7. GRB 061004: Swift-XRT Team Refined Analysis
  8. GRB 061004, Swift BAT refined analysis
  9. GRB 061004: Nearby 2MASS Galaxy
  10. GRB 060928: Correction to GCN 5690
  11. Konus-Wind observation of GRB 060928
  12. GRB 060928: Suzaku/WAM observation of the prompt emission
  13. GRB 060928: Swift observations
  14. GRB 060928: RHESSI Spectral Fit
  15. IPN triangulation of GRB060928 (long, exceptionally bright)
  16. GRB061002: Swift UVOT followup observations
  17. GRB 060930: near-IR afterglow candidate
  18. GRB 061002: Swift-XRT Team Refined Analysis
  19. VLA observations of GRB 060926
  20. GRB 061002, Swift-BAT refined analysis
  21. GRB 060908: Detection of a possible host
  22. GRB 060923A: Probable host galaxy in the R-band
  23. GRB 060807: Detection of a possible host galaxy
  24. GRB 060923A: VLA K-band Observations
  25. GRB060930: Faulkes Telescope South observation
  26. GRB 060929: Further XRT Refined Analysis
  27. GRB 060929: Swift/UVOT Optical Observations
  28. GRB 060930: ROTSE-III Optical Limits
  29. GRB 060927 : GAO 150cm telescope optical observation
  30. GRB060929: Swift-XRT refined analysis.
  31. GRB 060929, Swift-BAT further refined analysis - late-time flare
  32. GRB 060929: TNG K-band observations
  33. GRB 060929, Swift-BAT refined analysis
  34. GRB060929: Optical limit
  35. GRB 060929: BART observation
  36. GRB 060929: BOOTES-IR & OSN observations
  37. GRB060908: optical observations
  38. GRB 060729: An update on the late-time Swift observations
  39. GRB060923C: optical limit
  40. GRB060927: optical observations
  41. test of new software, grb
  42. GRB 060926: Swift-UVOT UVW1 Detection Retraction
  43. GRB 060927: Swift/UVOT Optical Observations
  44. GRB 060927: Early color
  45. GRB 060927: Swift XRT Team refined analysis
  46. GRB 060927 optical limit
  47. GRB 060927, Swift-BAT refined analysis
  48. GRB060926: improved redshift
  49. GRB 060927, optical observation
  50. GRB 060927: Possible host galaxy (star?) in the SDSS
  51. GRB060927: Faulkes Telescope South observation
  52. GRB 060926: MASTER: first minutes decay
  53. GRB 060927: optical afterglow confirmation
  54. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  55. GRB060926: VLT redshift
  56. GRB 060926: Swift-UVOT Detections
  57. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  58. GRB 060926: OPTIMA-Burst -- further observations
  59. GRB 060926: Swift XRT refined analysis
  60. GRB 060926, Swift-BAT refined analysis
  61. GRB 060923A: Radio Observations
  62. GRB 060926: MASTER OT alert observation
  63. GRB 060912A: Redshift of probable host galaxy
  64. GRB 060926: BOOTES-IR observations
  65. GRB060926 OPTIMA-Burst optical observation
  66. GRB 060926: MASTER optical observation
  67. GRB 060923C, Swift-BAT refined analysis
  68. GRB 060923C: VLA Observation
  69. GRB 060923C: NIR afterglow confirmed
  70. GRB060923C: AROMA optical obsevation
  71. GRB 060923C: Gemini Observations and Afterglow Candidate
  72. GRB 060923C, optical observation
  73. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  74. GRB 060923C: VLT J-band observations
  75. GRB060923B: Swift/UVOT upper limits
  76. GRB 060923B: Swift XRT Refined Analysis
  77. GRB 060923C: Swift XRT refined analysis
  78. GRB 060923C, Swift-BAT partial refined analysis
  79. GRB 060923A: Swift XRT refined analysis
  80. GRB 060923C: Keck Observations
  81. GRB 060923A: Keck and Gemini Observations
  82. GRB 060923B, Swift-BAT refined analysis
  83. GRB060923C : Faulkes Telescope South optical limits
  84. GRB060923C: Faulkes Telescope North optical observations
  85. GRB 060923C: optical observation
  86. GRB 060923, Swift-BAT refined analysis
  87. GRB 060923: Early Super-LOTIS Observations
  88. GRB 060923: UKIRT nIR observations - candidate afterglow
  89. GRB060923: Faulkes Telescope North optical observations
  90. GRB060923 - SDSS Pre-Burst Observations
  91. GRB 060923: KAIT observations
  92. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  93. GRB060919: Swift/UVOT optical observations
  94. GRB 060919 : Faulkes South Telescope Observations
  95. GRB 060919, Swift-BAT refined analysis
  96. GRB060919: XRT refined analysis
  97. GRB 060912A: VLA Observation
  98. GRB 060912A: Probable Host Galaxy
  99. GRB060825: MAGIC telescope GeV observation
  100. Konus-Wind observation of GRB 060912

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